Hows about VA keep it simpler than Qantas and ditch the overnight 717 at MCY and crew issues
VA could run VA1408 Cairns to Sydney (via MCY down) and VA1429 Sydney to Cairns (back via MCY)
It would only add about 40 minutes to the trip and have the advantage of Sunny Coasters being able to go north without the need to go south to do so
Locals are crying out for flights to the north, but no one is willing to give it a go